DCC in a new( yet unequipt) GP-40

[anthonykadzban]

'Santa' brought me the Dynamis DCC set this morning.
The two locos that do not have decoders are a fairly new Bachmann gp-40, the cheapest varity, without a dcc pin. The other is an old athearn SW-1200, and does not have a circut board. From my research, i need to buy a decoder for each loco. What do you reccommend? How would I go about fixin the two together so I can use DCC? I am running HO scale.
Thank You and Merry Christmas,
AK